Back to EveryPatent.com
United States Patent | 5,027,231 |
Fell | June 25, 1991 |
For setting of the static track angle by the adjustment of the tape pitch with respect to the scanning midplane in an initializing playback operation of a magnetic tape recording and playback equipment the course of signal amplitude over a track exhibited by an envelope signal derived from recorded signals is first used to regulate a capstan servo system so as to place an envelope maximum at a track middle. Then the tape pitch is adjusted by means of the tape guide rollers adjacent to the rotary scanning device so as to bring the envelope signals at the track ends up to the value of the maximum previously placed at the track middle. No special magnetic head is needed for this adjustment method.
Inventors: | Fell; Wolfgang (Seeheim, DE) |
Assignee: | BTS Broadcast Television Systems GmbH (Darmstadt, DE) |
Appl. No.: | 394588 |
Filed: | August 16, 1989 |
Aug 31, 1988[DE] | 3829972 |
Current U.S. Class: | 360/71; 360/130.23 |
Intern'l Class: | G11B 015/61 |
Field of Search: | 360/70,71,84,130.22,130.23,130.24 |
4573619 | Mar., 1986 | Grant | 226/190. |
4703370 | Oct., 1987 | Inoue et al. | 360/130. |
4709280 | Nov., 1987 | Delacou | 360/70. |